From owner-freebsd-xen@freebsd.org  Fri Mar 30 12:07:46 2018
Return-Path: <owner-freebsd-xen@freebsd.org>
Delivered-To: freebsd-xen@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id 59E13F66BE7
 for <freebsd-xen@mailman.ysv.freebsd.org>;
 Fri, 30 Mar 2018 12:07:46 +0000 (UTC)
 (envelope-from prvs=620b6eee9=roger.pau@citrix.com)
Received: from SMTP.EU.CITRIX.COM (smtp.eu.citrix.com [185.25.65.24])
 (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits))
 (Client CN "mail.citrix.com",
 Issuer "DigiCert SHA2 Secure Server CA" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id C59BD8589A
 for <freebsd-xen@freebsd.org>; Fri, 30 Mar 2018 12:07:45 +0000 (UTC)
 (envelope-from prvs=620b6eee9=roger.pau@citrix.com)
X-IronPort-AV: E=Sophos;i="5.48,381,1517875200"; d="scan'208";a="70809236"
Date: Fri, 30 Mar 2018 13:07:29 +0100
From: Roger Pau =?utf-8?B?TW9ubsOp?= <roger.pau@citrix.com>
To: Chris <syseng@gfsys.co.uk>
CC: <freebsd-xen@freebsd.org>
Subject: Re: [Bug 224003] xen kernel panics
Message-ID: <20180330120729.5jcuidllh2a4ya27@MacBook-Pro-de-Roger.local>
References: <5ABD7783.3040901@gfsys.co.uk>
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Disposition: inline
In-Reply-To: <5ABD7783.3040901@gfsys.co.uk>
User-Agent: NeoMutt/20180323
X-ClientProxiedBy: AMSPEX02CAS01.citrite.net (10.69.22.112) To
 AMSPEX02CL02.citrite.net (10.69.22.126)
X-BeenThere: freebsd-xen@freebsd.org
X-Mailman-Version: 2.1.25
Precedence: list
List-Id: Discussion of the freebsd port to xen - implementation and usage
 <freebsd-xen.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-xen>,
 <mailto:freebsd-xen-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-xen/>
List-Post: <mailto:freebsd-xen@freebsd.org>
List-Help: <mailto:freebsd-xen-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-xen>,
 <mailto:freebsd-xen-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 30 Mar 2018 12:07:46 -0000

On Thu, Mar 29, 2018 at 11:32:19PM +0000, Chris wrote:
> I'm having similar problems with xen on 11.1, AMD64, June 2017.
> The OS runs fine, but installed xen from package, setup exactly
> as per the handbook and get a kernel panic on two machines,
> complaining about iommu not being enabled.

FreeBSD/Xen Dom0 requires a working IOMMU, that's documented in the
handbook [0] section 21.8.1.

Can you paste the full output that you get when booting under Xen?

> Machines are: a Sun X4170 to start, then  a Proliant DL380 G7
> with E5630 cpu. Both have all the virtualisation options
> enabled in the bios, but there are no options on either machine
>  for iommu.

On Intel hardware the IOMMU is called VT-d. I have no idea if the
hardware that you list has an IOMMU, it depends on both the CPU and
the motherboard.

Without VT-d (an IOMMU) FreeBSD/Xen Dom0 won't work.

Roger.

[0] https://www.freebsd.org/doc/handbook/virtualization-host-xen.html